Influence of Measurement Methodologies for the Volumetric Air Flow Rate of Mobile Positive Pressure Fans on Drive Unit Performance

Since there are no legally defined testing requirements for mobile positive pressure fans, they may be tested based on methods that do not correspond to their actual operating conditions. Adequate assessment of the technical and conditions this type equipment is particularly important used in rescue operations. Such units should characterized by efficient reliable operation. This article investigates influence measurement volumetric airflow rate performance a power unit. The shows applied method, whether it PN-EN ISO 5801 (test pipe duct—Method A) or other methods, i.e., ANSI/AMCA 240-15 characteristics velocity profile (tests open flow—Method B), can cause differences demand fans from 3.2% 4.5%. propulsion translate into fuel consumption emissions harmful exhaust gases generated combustion drive (4 kW). It was also observed with conventional impellers (W1) show lower when applying Method B (open flow) tests, while turbo (W2) A (duct) tests applied. Comparative analysis parameters unit test group without taking account method errors up about 7.7%, 6.4%, 2.4% power, torque, speed, respectively.